Lionheart: The Kings' Crusade blends RTS and light roleplaying elements together and turns out to be rather good in the process. The emphasis is on tactical battles, but you'll be able to ally with various different factions to unlock new units as you take back the holy land. Conversely, the Saracens handle much more like a standard upgradeable army (but with extra looting, apparently). The multiplayer was an absolute mess, but since you won't find too many players around, this is probably well worth checking out by strategy fans.